package com.hbnu.exception;

import com.hbnu.commonclass.User;

/**
 * @author kittychen
 * @date 2025-09-24 10:22
 */
public class ExceptionDemo02 {

    public static void main(String[] args) {
        User user = new User("kittychen", 18);

        user = null;

        System.out.println(user.getUsername());
    }
}
